“Certainly, nobody can deny that we’ve had several years of warmer temperatures. If that signals just a routine change that is manmade or not, I don’t think anybody can say definitely.”

Listen:

In reality, the carbon-dioxide greenhouse effect is a physical fact known since the 1800s. The only scientifically plausible systematic explanation for the rapid and continuing warming of the planetary climate since 1950 is industrial greenhouse pollution. WIthout global policy to end the combustion of fossil fuels, concentrations are expected to double from current levels within decades.